I'd check with fly high/fat sac. They did the GG sacs and if anyone would know it would be them. Otherwise you might have to measure and have custom done. Or use the numbers to by the biggest one that will fit. It's so new you will probably be hard pressed to find the numbers. Fat sac does do custom sacs, but they aren't cheap.

I've got the long 1100's in my back compartments and they work well. They run all the way up just before the battery compartment and the trash can. Though when they are full, they lift the hinged seat on the passenger side a bit. In the front, stock plug n' play is about all that will fit, so if you want more you'll need to put a bag in the aisle. Wakemakers has a bag for the SA that looks like a mini enzo sack and holds 750 Ib.

I've got the long 1100's in my back compartments and they work well. They run all the way up just before the battery compartment and the trash can. Though when they are full, they lift the hinged seat on the passenger side a bit. In the front, stock plug n' play is about all that will fit, so if you want more you'll need to put a bag in the aisle. Wakemakers has a bag for the SA that looks like a mini enzo sack and holds 750 Ib.

The front bag is maxed out under the seats in the bow. I didn't see any extra space.

You probably could get more weight out of a enzo style sac when compared to the Supra SA Surf Sac but not by much.

The rear locker of the SA measures 35" x 25"x 19" and the under seat area is around 50" x 24" x 10". The port and starboard storage areas are symmetrical. The Supra SA Enzo Style bag has a rear section that measures 34" x 23" x 19" and an arm that comes out to 30" x 23" x 9". You are probably going to have around 15" of space between the end of the leg and the divider in the under seat compartment. Possibly you will miss out on 100 lbs. At the end of the day it is not enough weight to justify the price of ordering a custom sac in my opinion.